My 400l tank (100G) has been going fishless for a month or so after velvet wiped out all of my fish. I only have two corals, a few snails and a star fish left. Lately I noticed in addition to the corals, snails and the star fish there are some little critters crawling around the tank on the sand and rocks. They may have hitchhiked through the NSW I used for my tank. At the moment, I don't have a RODI unit. Here are some photos I took. Can someone please help ID these and advise if I should leave them or eradicate them? If eradicate, please let me know how best to do this.
And also is this aiptasia - refer to last photo?
Many thanks.
And also is this aiptasia - refer to last photo?
Many thanks.